Glyptodons roamed around North and South America until about 10,000 years ago, amiably munching on grasses and leaves. I don’t want to point any unjustified fingers here, but humans probably murdered these massive xenarthrans. Just sayin.
In unrelated news, I won’t be able to send out copies of The Evolutionist’s Doodlebook until late August. If you’re interested in purchasing a copy, however, check out either Amazon.com or one of the shops listed below. Thanks!